After Black 3, the Large Avalanche pattern is complete (see Large Avalanche Simple Variations for the variations where White 2 or Black 3 is played elsewhere ). White 4, Black 5 and White 6 next are forced, after which Black can choose amongst a, b and c. Here a is the oldest variation, b is newer and c is most modern, having been introduced by Go Seigen in a game against Takagawa Kaku in 1957. Nowadays, c is the most popular variation, while b is also still played often. See for the follow-ups:
-- Andre Engels
Under which circumstances would one prefer to play the outward turn rather than the inward, and vice versa?
-- Phlegmatic
The inward turn was invented so as to take the corner territory. The outward turn implies outside influence.
In many professional games I see white in the diagram above leave the joseki when black plays 1 in order to play tenuki. What is the reasoning behind this? What if black then cuts, what are white's options?
-- Kanin?